Mesoscale modulation of air-sea CO2 flux in Drake Passage

Song, Hajoon; Marshall, John; Munro, David R.; Dutkiewicz, Stephanie; Sweeney, Colm; McGillicuddy, D. J.; Hausmann, Ute

doi:10.1002/2016jc011714

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Mesoscale modulation of air-sea CO2 flux in Drake Passage

2016
By Song, Hajoon ; Marshall, John ; Munro, David R. ; ...
Source: Journal of Geophysical Research-Oceans, 121(9), 6635-6649.

[PDF-4.06 MB]

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Journal Title:

Journal of Geophysical Research: Oceans
Personal Author:

Song, Hajoon ; Marshall, John ; Munro, David R. ; Dutkiewicz, Stephanie ; Sweeney, Colm ; ... More +

Song, Hajoon ; Marshall, John ; Munro, David R. ; Dutkiewicz, Stephanie ; Sweeney, Colm ; McGillicuddy, D. J. ; Hausmann, Ute Less -
NOAA Program & Office:

OAR (Oceanic and Atmospheric Research) ; ESRL (Earth System Research Laboratory) ; CIRES (Cooperative Institute for Research in Environmental Sciences)

OAR (Oceanic and Atmospheric Research) ; ESRL (Earth System Research Laboratory) ; CIRES (Cooperative Institute for Research in Environmental Sciences) Less -
Description:

We investigate the role of mesoscale eddies in modulating air-sea CO2 flux and associated biogeochemical fields in Drake Passage using in situ observations and an eddy-resolving numerical model. Both observations and model show a negative correlation between temperature and partial pressure of CO2 (pCO(2)) anomalies at the sea surface in austral summer, indicating that warm/cold anticyclonic/cyclonic eddies take up more/less CO2. In austral winter, in contrast, relationships are reversed: warm/cold anticyclonic/cyclonic eddies are characterized by a positive/negative pCO(2) anomaly and more/less CO2 outgassing. It is argued that DIC-driven effects on pCO(2) are greater than temperature effects in austral summer, leading to a negative correlation. In austral winter, however, the reverse is true. An eddy-centric analysis of the model solution reveals that nitrate and iron respond differently to the same vertical mixing: vertical mixing has a greater impact on iron because its normalized vertical gradient at the base of the surface mixed layer is an order of magnitude greater than that of nitrate.
Source:

Journal of Geophysical Research-Oceans, 121(9), 6635-6649.
DOI:

https://doi.org/10.1002/2016jc011714
Document Type:

Journal Article
Funding:

Grant no. NA12OAR4310058
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urn:sha256:74ecb77b5092436f1293dddf61303ac1e63e24e845eebba0b3c0008fefc9f79b
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Mesoscale modulation of air-sea CO2 flux in Drake Passage

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